Underground Areas and Mohgwyn Palace Guide – Elden Ring

Introduction

The underground regions of Elden Ring offer some of the most challenging and rewarding content in the game. Mohgwyn Palace, accessible through the Mohgwyn Dynasty Mausoleum, stands as one of the most significant endgame dungeons, requiring careful preparation and strategic combat knowledge. This guide covers everything you need to navigate underground areas successfully and conquer Mohgwyn Palace, including optimal routes, enemy strategies, and valuable loot locations.

Underground Areas Overview

What Are Underground Regions?

Underground areas in Elden Ring are distinct subterranean zones accessible through specific mausoleums, caves, and portals scattered across the Lands Between. These regions feature unique enemies, environmental hazards, and powerful bosses that drop essential runes and items for late-game progression.

Main Underground Zones

Siofra River – An early-to-mid game area with ancestral spirits and underground architecture
Ainsel River – A scarlet rot-infested zone with challenging enemies and unique weapons
Mohgwyn Palace – The deepest underground region, reserved for endgame players
Leyndell, Ashen Capital – An underground variant of the capital city

Preparation for Underground Exploration

Essential Equipment

Torrent (Your Horse) – Cannot be used underground; rely on fast travel and sprint management
Light Source – Equip Hoarfrost Stomp or spells to handle groups efficiently
Poise-Heavy Armor – Underground enemies deal heavy poise damage; consider heavy armor for stability
Mimic Tear Ashes – The most powerful spirit summon for boss fights

Recommended Stats Before Entering Mohgwyn Palace

Vigor: 50+ (60+ recommended for melee builds)
Endurance: 30+ for consistent dodging
Weapon upgrade level: +8 to +10 for unique weapons, +20 for standard weapons
Flask charges: 14 Crimson Tears minimum

Siofra River: Gateway Underground

Overview & Access

Siofra River is your first underground experience. Access it through the Well in East Limgrave or by descending the elevator near the Siofra River Bank Site of Grace.

Key Locations & Enemies

Ancestral Spirits – Spectral bosses found in burial sites; defeat them for Ashes of War and Remembrances
Spirit Snails – Slow, explosive enemies; attack from range when possible
Ghostflame Apostles – Aggressive sorcerers; close the distance quickly
Erdtree Burial Watchmen – Slow but heavy hitters; stay behind them

Loot & Rewards

Uchigatana (curved sword)
Fingerprint Stone Shield (greatshield)
Rotten Winged Sword Insignia (talisman)
Ancestral Spirits drop Remembrances worth 20,000+ runes each

Navigation Tips

Use the Siofra River Bank as your main hub
Activate all Sites of Grace for fast travel
Sprint past non-essential enemies to conserve resources
The map reveals itself as you explore; take time to uncover the full layout

Ainsel River: Scarlet Rot Zone

Overview & Access

Ainsel River requires the Ranni's Questline progression or access through the Raya Lucaria Aqueduct. This zone features extensive scarlet rot hazards and powerful optional bosses.

Environmental Hazards

Scarlet Rot – Persistent DoT (damage over time); equip Rot-resistant gear or use Ritual Pots
Rot Flowers – Stationary spore-releasing plants; avoid directly
Poison pools – Less common than rot; antidote creates poison resistance buildup

Boss Strategy: Dragonkin Soldier of Nokron

Weakness: Lightning and fire magic
Attack Pattern: Aggressive combos with delayed swipes; dodge roll into attacks
Summon Usage: Mimic Tear or Ancestral Spirit are effective
Recommended Weapon: Katanas or spears for distance management

High-Value Loot

Blade of Calling (katana)
Ronin's Armor Set
Scarlet Rot Spore (crafting material)
Nox Flowing Hammer (unique great hammer)

Mohgwyn Palace: Endgame Dungeon

Access & Requirements

Mohgwyn Palace is accessible through the Mohgwyn Dynasty Mausoleum in the Consecrated Snowfield. Alternatively, use a special portal near the Dynasty Mausoleum Midpoint Site of Grace. This area is designed for players with 100+ Rune Level.

The Mohgwyn Dynasty Mausoleum (Pre-Boss)

This underground passage leads directly to the palace. Navigate carefully:

Bleed-Focused Enemies – Mohgwyn followers deal significant bleed buildup
Crucible Knights – Mini-bosses with delayed attack patterns; parry-friendly
Blood Knights – Fast, aggressive with scarlet rot abilities

Route Strategy: Sprint past non-essential enemies using Bloodhound's Step or similar mobility tools to reach the fog gate quickly.

Boss: Mohg, the Omen King

#### Phase 1: Standard Combat

Weapon of Choice: Bleed weapons trigger status effects; Rivers of Blood or Nagakiba work well
Attack Pattern: Wide swings followed by grab attacks; dodge rolls handle both
Talismans: Equip Dragoncrest Greatshield Talisman for physical defense
Strategy: Circle behind Mohg; avoid his charged blood attack
Summons: Mimic Tear Ashes (fully upgraded) trivializes this phase

#### Phase 2: Ritual Activation

Mohg summons Bloodflame and gains new attack chains
Critical Point: When he dives underground, sprint away; a bloodflame explosion follows
Perseverance Tip: Equip Ritual Pod to cancel Mohg's summoning ritual (situational, not essential)
Healing Window: Attack immediately after his bloodflame combo ends

#### Phase 3: Recovery & Victory

Continue applying bleed pressure
Dodge his delayed grab attacks
Use Flask charges conservatively; save them for critical moments
Victory grants Mohg's Great Rune and 480,000 runes

Mohgwyn Palace: Post-Boss Exploration

After defeating Mohg, extensive optional areas open:

Dynasty Mausoleum Midpoint – Hub Site of Grace
Blood Swamps – Secondary areas with Blood Knights and loot
Underground structures – Hidden rooms with crafting materials

Advanced Tips & Strategies

Bleed vs. Poison Build Optimization

Bleed Weapons: Faster buildup (25-30 hits); ideal for Mohgwyn Palace
Poison Weapons: Slower buildup (40+ hits); better for endurance fights
Combination Strategy: Use bleed on main hand, poison on off-hand for hybrid pressure

Spirit Summon Ranking for Underground

Mimic Tear Ashes – Copies your build exactly; most powerful option
Ancestral Spirits – High damage output; excellent for group control
Latenna's Bow – Range support; keeps enemies distracted
Omenkiller Rollo – Tanky option for heavy fights

Magic Build Underground Advantages

Sorceries: Rennala's Full Moon scales with Intelligence; devastating against Mohg
Incantations: Bloodflame Talons synergizes with Mohgwyn Palace theme
Fingerprint Stone Shield blocking: Use magic spells while shielded for hybrid offense

Rune Farming Post-Mohgwyn

After defeating Mohg, farm the Blood Swamps for:

1,000+ runes per enemy
Efficient routes net 50,000+ runes per 5-minute run
Equip Scarab Talisman (+20% item discovery) for rare drops

Common Mistakes to Avoid

Not leveling Vigor sufficiently – Mohg's combo attacks one-shot low-vigor builds
Ignoring bleed buildup – Don't get caught with max bleed status; back off to recover
Overextending stamina – Always maintain roll capacity; sprinting without stamina leaves you vulnerable
Skipping Sites of Grace – Activate every Site of Grace for safety net fast travel
Underestimating grab attacks – Mohg's grabs deal massive damage; always dodge when he raises his hand

Conclusion

Underground areas and Mohgwyn Palace represent the culmination of Elden Ring's challenging endgame content. Success requires preparation, patience, and understanding of enemy attack patterns. Master the early underground zones to build confidence, equip appropriate talismans and weapons, and approach Mohg with a clear strategy. Victory yields substantial rewards and opens new questlines, making this journey essential for completionists and dedicated players.